Question

How many moles of Fe are obtained from 1 mole of Fe2O3

Answer 1

In one mole of fe2o3 there are two moles of iron atoms. Now gram atomic wt.of Fe is 56.So in one mole of Fe2O3 there are 2×56=112 gm of Fe. Hence in 1.75molesFe2O3 there are 1.75×2 moles or 1.75×56 gm of iron.

Answer 2

The number of moles of Fe was obtained from 1 mole of Fe₂O₃ are as follow -

• When one mole of Fe₂O₃ decomposes, the following reaction takes place - Fe₂O₃ → 2Fe + 3/2O₂.
• From the law of conservation of mass, the number of moles of an element on the reactant side much be equal to the number of moles of element on the product side.
• Therefore by following that law, we get that, one mole of Fe₂O₃ produces two moles of iron and 3/2 moles of oxygen.
• So, two moles of  Fe were obtained from 1 mole of Fe₂O₃.